You know how that well known online shop
Amazon makes recommendations to you on the strength of previous purchases? It can be quite handy. You know: "you recently bought Star Trek season three...have you tried Boston Legal?"
But I just got this baffling email from them. And by the way, the Lucy dvd WAS a gift for someone else:
"Dear Amazon.com Customer,
We've noticed that customers who have purchased or rated I Love Lucy - Season One (Vol. 4) have also purchased Math in Our Lives: Measuring-Metric (Home Use) on DVD. For this reason, you might like to know that Math in Our Lives: Measuring-Metric (Home Use) is now available. You can order yours for just $17.99 by following the link below."
...and it goes on to explain...
"Measuring-Metric focuses on the metric system. Viewers learn about the metric units used to measure length, volume and mass, and how to make metric conversions. Interesting examples from real life will help viewers develop a sense of size in metric terms - from very small to very large. The program includes a discussion of where the metric system has become dominant, and why it is considered an improvement over the standard (English) system still used in the United States. Part of "Math in Our Lives," an innovative nine-program series that uses practical examples and realistic models to provide students with an accessible context for mathematical concepts. (For Home Use Only)
This product is manufactured on demand using DVD-R recordable media. Amazon.com's standard return policy will apply."
Got any other good examples?